Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
  • B60H1/00—Heating, cooling or ventilating devices
  • B60H1/00357—Air-conditioning arrangements specially adapted for particular vehicles
  • B60H1/00385—Air-conditioning arrangements specially adapted for particular vehicles for vehicles having an electrical drive, e.g. hybrid or fuel cell
  • B60H1/00392—Air-conditioning arrangements specially adapted for particular vehicles for vehicles having an electrical drive, e.g. hybrid or fuel cell for electric vehicles having only electric drive means
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
  • B60H1/00—Heating, cooling or ventilating devices
  • B60H1/00271—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit
  • B60H1/00278—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit for the battery
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
  • B60H1/00—Heating, cooling or ventilating devices
  • B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
  • B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
  • B60H1/00878—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices
  • B60H1/00899—Controlling the flow of liquid in a heat pump system
  • B60H1/00921—Controlling the flow of liquid in a heat pump system where the flow direction of the refrigerant does not change and there is an extra subcondenser, e.g. in an air duct
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
  • B60H1/00—Heating, cooling or ventilating devices
  • B60H1/00271—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit
  • B60H2001/00307—Component temperature regulation using a liquid flow
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
  • B60H1/00—Heating, cooling or ventilating devices
  • B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
  • B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
  • B60H1/00878—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices
  • B60H2001/00928—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices comprising a secondary circuit

Definitions

• the invention is in the field of ventilation, heating and / or air conditioning of an electric motor vehicle. It relates to a secondary loop intended to be associated with an air conditioning loop. It also relates to an air conditioning system comprising the air conditioning loop and the secondary loop. Finally, it relates to a method of implementing such a system.
• An electric or hybrid motor vehicle whose propulsion is provided at least partially by an electric motor, is commonly equipped with a ventilation, heating and / or air conditioning system to modify the aerothermal parameters of the air contained in the inside the vehicle interior.
• a ventilation, heating and / or air conditioning system to modify the aerothermal parameters of the air contained in the inside the vehicle interior.
• Such a modification is obtained from the delivery of at least one air flow inside the passenger compartment.
• the installation consists mainly of a housing that channels the flow of air flow prior to the delivery of the latter inside the passenger compartment.
• the installation cooperates with an air conditioning loop inside which circulates a refrigerant.
• the air-conditioning loop comprises a compressor for compressing the refrigerant fluid, a refrigerant / heat-transfer fluid heat exchanger for cooling the refrigerant fluid at a relatively constant pressure, at least one expansion element to allow expansion of the refrigerant fluid, an evaporator arranged at inside the case to cool the flow of air passing through the latter and, optionally, a refrigerant accumulator.
• a secondary loop inside which circulates the coolant, is arranged to recover heat from the electric motor that propels the vehicle.
• the secondary loop comprises a radator housed inside the housing for heating the air flow, the refrigerant / heat transfer fluid heat exchanger for recovering heat from the cooling fluid, a coolant / ambient air exchanger. to evacuate any excess heat and the electric motor of the vehicle associated with an electronic power unit that provides control of the engine.
• the air conditioning loop is provided with at least one valve for configuring the air conditioning loop or heating mode and thus allow the air conditioning loop to deliver heat to the secondary loop through the exchanger refrigerant fluid / heat transfer fluid, or in cooling mode to cool the air flow via the evaporator.
• ISAJI et ail which describes such an air conditioning system comprising the secondary loop and the air conditioning loop.
• the system comprises a large number of ducts connecting the various elements of the system which generates a detrimental clutter and excessive weight.
• a system does not allow optimized management of the heat exchange that the various elements constituting the loop undergo. air conditioning and / or the secondary loop. More specifically, the heat recovered from the electric motor by the secondary loop is insufficient to effectively heat the air flow. In addition, the amount of energy lost is a function of the speed of the vehicle, which is unsatisfactory.
• the heat exchanges are not optimized under certain conditions of use of the vehicle, and in particular when the latter undergoes frequent stops, for example in traffic jams and / or under certain conditions of ambient air temperature, consisting of the air outside the vehicle therefore subject to high thermal amplitudes.
• the purpose of the present invention is to provide a secondary loop which has a simple architecture and is compact and lightweight, the secondary loop being constitutive of an air conditioning system capable of operating in air conditioning mode, heating mode and dehumidification mode
• an air conditioning system capable of operating in air conditioning mode, heating mode and dehumidification mode
• Such a system offers, in a mode of operation, a high coefficient of performance, in particular between 3 and 4.
• Another object of the present invention is to propose a method for implementing such an air conditioning system in heating mode, dehumidification mode and in operation mode with a high coefficient of performance, in particular between 3 and 4.
• a secondary loop of the present invention is a secondary loop inside which circulates a coolant F F.
• the secondary loop consists of a main line between a discharge of a first three-way valve and an inlet of a second three-way valve, a first secondary line between a first outlet of the second valve three -channels and a first input of the first three-way valve and a second secondary line between a second outlet of the second three-way valve and a second inlet of the first three-way valve.
• the main line advantageously comprises at least one heat exchanger coolant / electrical auxiliary, for example dedicated to the exchange with an electric motor and / or a power electronic box and / or a battery.
• the main line comprises a main pump while the first secondary line comprises a secondary pump.
• the second secondary line comprises a second secondary pump.
• the first secondary line comprises a first refrigerant / heat transfer fluid heat exchanger, which makes it possible to pass calories from the coolant to the heat transfer fluid, and vice versa.
• the second secondary line comprises a second fluid heat exchanger heat / ambient air, so as to allow an exchange with the ambient air
• the first secondary line comprises a radiator which exchanges with air flowing inside a ventilation, heating and air conditioning system.
• the first secondary line comprises means for electric heating of the coolant.
• the invention also relates to an air conditioning system comprising a secondary loop as described above and an air conditioning loop inside which circulates a refrigerant, the air conditioning loop comprising a first bypass and a second bypass.
• the first heat exchanger coolant / heat transfer fluid is also component of the air conditioning loop, a third heat exchanger which exchanges between the coolant and the ambient air being provided so as to transfer the calories present in the coolant to the ambient air both by the second heat exchanger coolant / ambient air and the third heat exchanger.
• a method of implementing the invention is also covered.
• the process consists, simultaneously or in sequence, in opening the first bypass, closing the second bypass, closing the first exit and the first entrance, opening the evacuation , the ad m ission, the second output and the second input, and put the main pump into operation.
• the method consists, simultaneously or in sequence, in closing the evacuation and admission, opening the first outlet, the first inlet, the second outlet and the second inlet, and putting the first pump into operation. secondary.
• the method consists, simultaneously or in sequence, in closing the first bypass, opening the second bypass, opening the first outlet, the first inlet, the evacuation and the first opening. inlet, to close the second outlet and the second inlet, and to operate the main pump or the first secondary pump.
• the method consists, simultaneously or in sequence, of closing the first bypass and the second bypass, opening the first outlet, the first inlet, the evacuation, the admission, to be closed. the second output and the second input, and put into operation the main pump or the first secondary pump.
• Fig. 1 is a schematic illustration of a second loop according to the present invention.
• Fig.2 to Fig. 8 are schematic illustrations of an air conditioning system comprising the secondary loop shown in the previous figure, according to different embodiments and according to different modes of operation. These modes of operation are represented by means of solid lines or dashed lines.
• the lines shown in lines illustrate a circulation of the fluide concerned by the circu it and the channels isations represented in dots illustrate a lack of circulation of the fluid concerned by the circuit.
• a motor vehicle is equipped with an air conditioning system 1 for modifying the aerothermal parameters of the air contained inside the passenger compartment of the vehicle.
• the air-conditioning system 1 comprises an air-conditioning loop 2 to the interior of the refrigerant unit, especially supercritical, such as carbon dioxide known under the name R744.
• the air conditioning system 1 also comprises a secondary loop 3 inside which circulates a coolant F F, such as a mixture of water and glycol.
• a first heat exchanger / coolant heat exchanger 4 is constitutive of both the air conditioning loop 2 and the secondary loop 3, so that the cooling fluid FR and the coolant F F can exchange heat with one another. with the other.
• the present invention proposes that the secondary loop 3 consists of a main line 5 between a discharge 6 of a first three-way valve 7 and an inlet 8 of a second three-way valve 9, a first line secondary 10 between a first output 1 1 of the second three-way valve 9 and a first inlet 12 of the first three-way valve 7 and a second secondary line 13 between a second outlet 14 of the second three-way valve 9 and a second inlet 15 of the first three-way valve 7.
• the present invention proposes a secondary loop 3 having a single arch it is very simple, m in im ing the number of cond u ices rel ling the different elements that compose it.
• Such an architecture also has the advantage of being light and compact.
• the secondary loop 3 comprises a first circulation circuit 5, 10 of the coolant F F consisting of the main line 5 and the first secondary line 10, and a second circulation circuit 5,13 of the heat transfer fluid F ⁇ consisting of the main line 5 and the second secondary line 13.
• the heat transfer fluid F ⁇ _ flows in a first direction of circulation S1_, while inside of the second circulation circuit 5,13, the heat transfer fluid F ⁇ flows in a second direction of circulation S2.
• the main line 5 comprises at least one heat transfer fluid heat exchanger FC / electrical auxiliary.
• the reference 16 shows more particularly a coolant heat exchanger FC / electric motor 16, such as the motor adapted to allow the movement of the vehicle.
• Other electrical auxiliaries are conceivable such as a battery or an electronic power unit referenced 17, associated with the electric motor 1 6.
• the main line 5 also comprises a main pump 1 8 for circulating the heat transfer fluid F ⁇ from the evacuation 6 of the first three-way valve 7 to the inlet 8 of the second three-way valve 9.
• the first secondary line 10 comprises the first refrigerant / heat transfer fluid heat exchanger 4 and a secondary pump 19.
• the latter allows circulation of the coolant F F from the first outlet 1 1 of the second three-way valve 9 to the first inlet 12 of the first three-way valve 7 through the first heat exchanger fluid coolant / coolant 4.
• the second secondary line 13 comprises a second heat exchanger heat-exchange fluid FC / ambient air 20. The latter is able to allow a heat exchange between the heat transfer fluid F ⁇ and ambient air A, such as the air outside the vehicle.
• the second heat exchanger heat transfer fluid / ambient air 20 is frequently arranged at the front of the vehicle being associated with a fan 21 to facilitate the exchange of heat between the heat transfer fluid F ⁇ _ and the ambient air A, and more specifically to maximize heat transfer of the heat transfer fluid F 1 to ambient air A.
• the second secondary line 13 starts at the second outlet 14 of the second three-way valve 9 and ends at the level of the first inlet 15 of the first three-way valve 7 passing through the second heat transfer fluid heat exchanger FC / ambient air 20.
• the circulation of heat transfer fluid F ⁇ in this second secondary line 13 is provided by the main pump 18 or the secondary pump 19, depending on the modes of use of the secondary loop.
• the air conditioning loop 2 comprises a compressor 23 for compressing the refrigerant FR, a first expansion member 25 to allow expansion of the refrigerant FR, a first bypass or bypass valve 31 placed in parallel with the first expansion member 25, the first refrigerant / heat transfer fluid heat exchanger 4, a third refrigerant / ambient air heat exchanger 26 to allow a heat exchange between the refrigerant fluid FR and the ambient air A, a second expansion member 27 to allow expansion of the refrigerant fluid FR, an evaporator 28 for cooling an air flow 29 which passes through the evaporator 28, an accumulator 30 to collect a possible reliquat of refrigerant fluid FR to the liquid state at the outlet of the evaporator 28 and a second bypass or valve of bypass 32 placed in parallel with the evaporator 28 and the second expansion member 27.
• the air conditioning system 1 cooperates with a ventilation, heating and / or air conditioning installation 33 fitted to a motor vehicle.
• the installation 33 consists mainly of a plastic housing housed under a dashboard of the vehicle.
• the installation 33 is intended to channel the circulation of the air flow 29 prior to its delivery to the interior of the passenger compartment, in order to modify the aerothermal parameters of the air contained in the passenger compartment of the vehicle.
• the installation 33 houses a blower 34 for circulating the air flow 29 inside the installation 33.
• the installation 33 also houses the evaporator 28 for cooling the air flow 29 before it is delivered. inside the cockpit.
• the air conditioning loop 2 comprises a gas cooler 24 which is intended to cool the refrigerant fluid FR at relatively constant pressure by yielding heat to the flow of air 29.
• the gas cooler 24 behaves as a radiator for heating the air flow 29 by exchange between the refrigerant fluid FR in the gas phase and at high temperature with the air flow 29 through the cooler deg az 24.
• the gas cooler 24 is housed inside the installation 1.
• the gas cooler 24 is placed downstream of the evaporator 28 in a direction of flow 35 of the air flow 29 inside the installation 33.
• the gas cooler 24 is associated with at least one flap of air mixing 36 which is operable between a closed position, shown in Fig.2 and Fig.3, wherein the air mixing flap 36 prohibits a passage of the air flow 29 through the gas cooler 24, and an open position, shown in Fig.4 and Fig.5, wherein the air mixing flap 36 allows such a passage.
• another three-way valve may be provided at the output of the compressor 23.
• This complementary valve has an input connected to the output of the compressor 23, a first output connected to the inlet of the gas cooler 24 and a second output connected to the inlet of the first expansion member 25. This arrangement allows the refrigerant FR to bypass the gas cooler 24 in cooling mode and thus limits the pressure losses in the air conditioning loop since the refrigerant does not not pass through the gas cooler 24 in this mode.
• the first expansion member 25 and the first bypass 31 are interposed on the air conditioning loop 2 between the compressor 23 and the first refrigerant / heat transfer fluid heat exchanger 4.
• the secondary loop 3 comprises a radiator 37. More particularly, the radiator 37 participates in the first secondary line 10 of the secondary loop 3, as well as a electrical heating device 38 of the coolant F ⁇ , for example consisting of at least one electrical resistor or the like.
• the radiator 37 is housed inside the installation 33 downstream of the evaporator 28 in the direction of flow 35 of the air flow 29 inside the installation 33.
• the radiator 37 is associated with at least one air mixing flap 36 which is operable between an open position, shown in FIG.
• the first expansion member 25 and the first bypass 31 are interposed on the air conditioning loop 2 between the first refrigerant / heat transfer fluid heat exchanger 4 and the third refrigerant / ambient air heat exchanger 26 .
• the air conditioning system 1 operates in air conditioning mode.
• the air conditioning loop 3 allows cooling of the air flow 29 via the evaporator 28.
• the first bypass 31 is open to prevent expansion of the refrigerant FR to the refrigerant. inside the first expansion member 25 while the second bypass 32 is closed to force the refrigerant FR to undergo expansion within the second expansion member 27.
• the mixing flap 36 is in the closed position for minimize the heat exchange inside the gas cooler 24 between the refrigerant fluid FR and the air stream 29.
• the air conditioning system 1 operates in air conditioning mode.
• the heat transfer fluid F ⁇ circulates only inside the second circulation circuit constituted by the main line 5 and the second secondary line 13, the first outlet 11 and the first inlet 12 being closed while the evacuation 6 the inlet 8, the second outlet 14 and the second inlet 15 are open.
• the secondary loop 3 allows cooling of the electrical auxiliaries, including the electric motor 16, through the coolant heat exchanger F ⁇ / auxiliary electric and the heat exchanger fluid coolant / ambient air 20.
• the heat transfer fluid F ⁇ not flowing inside the first secondary line 10 no heat exchange takes place between the heat transfer fluid F ⁇ and the refrigerant fluid FR through the first heat exchanger fluid coolant / heat transfer fluid 4.
• This configuration of the air conditioning system 1 is particularly advantageous when the electric vehicle is in rolling mode, that is to say when the electric motor is running and needs to be cooled.
• the air conditioning loop 2 and the secondary loop 3 operate independently of each other in the sense that no heat exchange occurs between the coolant F F and the refrigerant FR.
• the heat transfer fluid F ⁇ circulates only inside the first secondary line 10 and the second secondary line 13, and does not circulate in the main line 5.
• the evacuation 6 and the inlet 8 are closed while the first outlet January 1, the first inlet 12, the second outlet 14 and the second inlet 1 5 are open.
• the heat transfer fluid F ⁇ circulates inside the first secondary line 10 to allow the cooling fluid FR to give the heat transfer fluid F ⁇ through the first heat exchanger fluid coolant / heat transfer fluid 4.
• This heat is conveyed by the heat transfer fluid F ⁇ _ to the second heat exchanger heat transfer fluid / ambient air 20. The latter is then able to transfer this heat to the ambient air A.
• This configuration of the air conditioning system 1 does not allow a cooling of the electric motor 16 through the second heat exchanger heat transfer fluid / ambient air 20 so that this configuration is particularly advantageous in the case where the electric motor 16 does not produce heat, especially when the vehicle is stopped , in traffic jams for example.
• this configuration allows a heat transfer of the refrigerant fluid FR to the heat transfer fluid FC through the first heat exchanger fluid coolant / heat transfer fluid 4 so that the heat load to be transferred by the third heat exchanger fluid coolant / ambient air 26 from the coolant FR to the ambient air A is minimized.
• the air conditioning system 1 operates in heating mode.
• the air conditioning loop 3 allows the air stream 29 to be heated via the gas cooler 24.
• the first bypass 31 is closed to allow the cooling fluid FR to be released.
• the second bypass 32 is open to prevent the refrigerant fluid FR to undergo a relaxation inside the second expansion member 27.
• the evaporator 28 is inoperative, c that is to say not crossed by the refrigerant fluid FR.
• the mixing flap 36 is in the open position to maximize the heat exchange inside the gas cooler 24 between the refrigerant fluid FR and the air flow 29.
• the heat transfer fluid F ⁇ circulates only inside the first circulation circuit 5, 1 0; the first outlet 11, the first inlet 12, the outlet 6, the inlet 8 being open while the second outlet 14 and the second inlet 15 are closed. It follows that the secondary loop 3 allows cooling of the electrical auxiliaries, including the electric motor 16 via the heat transfer fluid exchanger F ⁇ / auxiliary electric and the first heat exchanger fluid coolant / heat transfer fluid 4. In this configuration , the latter allows a transfer of heat from the heat transfer fluid F ⁇ to the refrigerant fluid FR, in order to heat the air flow 29 and thus create a cold point necessary for the thermodynamic operation of the air conditioning loop 2.
• This configuration of the air conditioning system 1 is particularly advantageous when the electric vehicle is in rolling mode, it is that is to say when the electric motor is running and needs to be cooled, and more particularly when the ambient air temperature A is low.
• the first refrigerant / heat transfer fluid heat exchanger 4 operates as an evaporator by allowing coolant coolant F F to cool, in order to partly cool the electric motor 16 and secondly by allowing a heating of the air flow 29 thanks to the hot point created in the gas cooler 24 and the cold point created at the first refrigerant / heat transfer fluid heat exchanger 4.
• the air conditioning system 1 operates in dehumidification mode.
• the air conditioning loop 3 allows cooling of the air flow 29 by the evaporator 28, then a heating of the air stream 29 via the gas cooler 24.
• the first by -pass 31 is closed to allow a first expansion of the refrigerant fluid FR inside the first expansion member 25 and the second bypass 32 is also closed to allow a second expansion of the refrigerant fluid FR within the second organ 27.
• the first heat exchanger fluid coolant / heat transfer fluid 4 and the third heat exchanger heat transfer fluid F ⁇ _ / ambient air 26 each act as an evaporator, allowing a cooling of the heat transfer fluid F ⁇ _, to subsequently cool the electric motor 16, especially when the vehicle is traveling at low speed, or is stopped in traffic jams.
• the mixing flap 36 is in the open position to maximize the heat exchange inside the gas cooler 24 between the refrigerant fluid FR and the air flow 29.
• the heat transfer fluid F ⁇ circulates only inside the first circulation circuit 5, 1 0, the first output 1 1 and the first input 1 2, the evacuation 6, the admission 8 being open while the second output 14 and the second input 15 are closed.
• the secondary loop 3 allows a cooling of the electric motor 16 by means of the first heat exchanger fluid coolant / heat transfer fluid 4.
• the latter allows a heat transfer from the heat transfer fluid F ⁇ _ to the FR refrigerant.
• the coolant F 1 does not circulate inside the second secondary line 13
• no heat exchange takes place between the heat transfer fluid F 1 and the refrigerant fluid FR through the second heat exchanger heat transfer fluid / ambient air 20.
• the air conditioning system 1 operates in heating mode.
• the secondary loop 2 allows a heating of the air flow 29 via the radiator 37 and / or the electric heater 38.
• the mixing flap 36 is in the open position to maximize the exchange of air. heat inside the radiator 37 between the coolant F F_ and the air stream 29. Said device is in particular activated when the ambient air is at an extreme negative temperature, for example below -10 ° C.
• the coolant F F circulates only inside the first circulation circuit 5,10, the first outlet January 1 and the first inlet 12, the discharge 6, the admission 8 being open while the second outlet 14 and the second entrance 15 are closed.
• the secondary loop 3 allows a cooling of the electrical auxiliaries, including the electric motor 16 via the heat transfer fluid exchanger F ⁇ / auxiliary electric combined with the radiator 37 which allows the heat transfer fluid F ⁇ to give heat from the electric motor to the air flow 29 passing through the radiator 37.
• the first refrigerant / heat transfer fluid heat exchanger 4 allows heat transfer from the coolant F F to the refrigerant FR, in order to heat the flow
• the cooling fluid F 1 does not circulate inside the second secondary line 13, and there is no heat exchange between the coolant F 1 and the ambient air A through the second fluid heat exchanger. coolant / ambient air 20.
• the first bypass 31 is closed to allow a relaxation of the refrigerant fluid FR inside the first expansion member 25 while the second bypass 32 is open to prevent the refrigerant fluid FR to undergo a relaxation inside the second relaxation member 27.
• the evaporator 28 is inoperative and the third heat exchanger heat transfer fluid / ambient air 26 behaves as an evaporator.
• the air conditioning system 1 of Fig. 6 operates in cooling mode.
• the first bypass 31 is open to prohibit an expansion of the refrigerant fluid FR inside the first expansion member 25 while the second bypass 32 is closed to allow the refrigerant fluid FR to undergo a
• the evaporator 28 is able to cool the flow of air 29 so that the third heat-exchange heat-exchange heat exchanger FG_ / ambient air 26 behaves like a condenser. .
• the secondary loop 2 allows cooling of the electrical auxiliaries, in particular of the electric motor 1 6.
• the coolant F 1 circulates only inside the second circulation circuit 5, 13, the first outlet 1 1 and the first input 12 being closed while the evacuation 6, the inlet 8, the second outlet 14 and the second inlet 15 are open.
• the secondary loop 3 allows a cooling of the electric motor 16 via the second heat exchanger heat transfer fluid / ambient air 20 which allows the coolant F ⁇ to give heat to the ambient air A.
• the flu Fc_ coolant ide not flowing inside the first secondary line 10, no heat exchange is effected between the heat transfer fluid FC and the refrigerant fluid FR through the first heat exchanger refrigerant fluid FR / fluid coolant 4.
• the secondary loop 2 does not allow the electric motor 1 6 to cool.
• the heat transfer fluid F 1 circulates only inside the first secondary line 10 and the second secondary line 13, the evacuation 6 and the inlet 8 being closed while the first outlet January 1, the first inlet 12, the second outlet 14 and the second inlet 15 are open.
• a heat exchange between the coolant F F and the refrigerant FR by via the first refrigerant / heat transfer fluid heat exchanger 4 is produced.
• the second fluid heat exchanger heat exchanger / ambient air 20 also behaves as a condenser. In this configuration, the second heat exchanger heat transfer fluid / ambient air 20 completes the condenser operation of the third heat transfer fluid heat exchanger F ⁇ _ / ambient air 26.

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• Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• Thermal Sciences (AREA)
• Mechanical Engineering (AREA)
• Life Sciences & Earth Sciences (AREA)
• Sustainable Development (AREA)
• Sustainable Energy (AREA)
• Air-Conditioning For Vehicles (AREA)

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• 2009
  • 2009-09-03 FR FR0904195A patent/FR2949386B1/fr not_active Expired - Fee Related
• 2010
  • 2010-08-31 WO PCT/EP2010/062752 patent/WO2011026847A1/fr not_active Ceased
  • 2010-08-31 EP EP10763634.2A patent/EP2473362B1/de active Active

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